diff --git a/include/tins/icmpv6.h b/include/tins/icmpv6.h
index 0be1a7e..2be304e 100644
--- a/include/tins/icmpv6.h
+++ b/include/tins/icmpv6.h
@@ -92,7 +92,9 @@ public:
         MULTICAST_ROUTER_ADVERT = 151,
         MULTICAST_ROUTER_SOLICIT = 152,
         MULTICAST_ROUTER_TERMINATE = 153,
-        RPL_CONTROL_MSG = 155
+        RPL_CONTROL_MSG = 155,
+        EXTENDED_ECHO_REQUEST = 160,
+        EXTENDED_ECHO_REPLY = 161
     };
     
     /**